package com.heima.admin.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdChannelMapper;
import com.heima.admin.service.AdChannelService;
import com.heima.model.admin.dtos.ChannelDTO;
import com.heima.model.admin.pojos.AdChannel;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;

@Service
public class AdChannelServiceImpl extends ServiceImpl<AdChannelMapper, AdChannel> implements AdChannelService {
    /**
     * 分页条件查询
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findByNameAndPage(ChannelDTO dto) {

        if (dto==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检查
        dto.checkParam();
        //2.按名称模糊分页查询
        Page page = new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<AdChannel> queryWrapper = Wrappers.lambdaQuery();
        if (StringUtils.isNotBlank(dto.getName())) {
            queryWrapper.like(AdChannel::getName,dto.getName());
        }
        if (dto.getStatus()!=null) {
            queryWrapper.eq(AdChannel::getStatus,dto.getStatus());
        }
        // 添加排序
        queryWrapper.orderByAsc(AdChannel::getOrd);
        IPage result = this.page(page, queryWrapper);
        //3.结果封装
        PageResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), result.getTotal(), result.getRecords());
        return responseResult;
    }

    /**
     * 新增
     * @param channel
     * @return
     */
    @Override
    public ResponseResult insert(AdChannel channel) {
        // 1 参数校验
        if (channel == null || StringUtils.isBlank(channel.getName())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        // 2 判断该频道是否存在
        int count = this.count(Wrappers.<AdChannel>lambdaQuery().eq(AdChannel::getName, channel.getName()));
        if (count>0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已经存在");
        }
        if (channel.getName().length() > 10){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_ALLOW,"添加字符不能超过10");
        }
        // 3 执行新增
        channel.setCreatedTime(new Date());
        this.save(channel);
        // 4 返回结果
        return ResponseResult.okResult();
    }

    /**
     * 修改频道及频道状态
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult update(AdChannel adChannel) {
//        System.out.println(1/0);
        //1 参数校验
        if (adChannel == null || adChannel.getId() == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        //2 执行修改
        AdChannel channel = this.getById(adChannel.getId());
        if (channel == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.ADMING_CHANNEL_NOT_EXIST);
        }
        //3. 校验名称唯一性
        if (StringUtils.isNotBlank(adChannel.getName()) && !adChannel.getName().equals(channel.getName())) {
            int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                    .eq(AdChannel::getName, adChannel.getName()));
            if(count > 0){
                return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
            }
        }
        if (channel.getName().length() > 10){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_ALLOW,"修改字符不能超过10");
        }
        this.updateById(adChannel);

        //4 返回结果
        return ResponseResult.okResult();
    }

    /**
     * 删除频道
     * @param id
     * @return
     */
    @Override
    public ResponseResult deleteById(Integer id) {
        //1.检查参数
        if (id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"id不能为空");
        }
        //2.判断当前频道是否存在 和 是否有效
        AdChannel adChannel = this.getById(id);
        if (adChannel==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"当前频道为空");
        }
        // 启用状态下不能删除
        if (adChannel.getStatus()){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE,"启用状态下不能删除");
        }
        //3.删除频道
        this.removeById(id);
        return ResponseResult.okResult();
    }
}